tuanhiep/investment-ai ? reverse-engineered prompt

Build me a full stack investment research app that feels like a disciplined assistant for asking stock questions, not a hype machine.

I want a chat based workspace where someone can ask about a company or ticker and get a careful answer grounded in evidence, with citations, a simple valuation range, margin of safety notes, and clear warnings when the data is weak or missing. It should pull market snapshots from free public sources, use SEC filings and recent price data when available, and still work in a mock mode for demos. If there is no OpenAI key, it should still return a useful local fallback response.

Please include a clean React frontend with chat, sources, and key market metrics, plus a FastAPI backend with REST and WebSocket chat support. Keep the app public safe, so private prompt settings and secrets can live in local environment files. If you need to look up current docs online for anything, go ahead.